Submission #1211380

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211380		omsincoconut	Beech Tree (IOI23_beechtree)	C++17	0 / 100	1 ms	320 KiB

beechtree

#include "beechtree.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> beechtree(int N, int M, vector<int> P, vector<int> C) {
    vector<int> ret(N);

    vector<vector<int>> child(N);
    for (int i = 1; i < N; i++) child[P[i]].push_back(i);
    
    vector<int> maxdeg(N);
    vector<array<int, 2>> have(N);
    for (int i = N-1; i >= 0; i--) {
        ret[i] = true;

        for (int v : child[i]) {
            maxdeg[i] = max(maxdeg[i], maxdeg[v]);
            have[i][0] += have[v][0];
            have[i][1] += have[v][1];
        }

        if (maxdeg[i] >= 2 || child[i].size() > 2) ret[i] = false;

        maxdeg[i] = max(maxdeg[i], (int)child[i].size());

        if (maxdeg[i] == 2) {
            int sp[2] = {0, 0};
            for (int v : child[i]) sp[C[v]-1]++;
            if (have[i][0] > sp[0] && have[i][1] > sp[1]) ret[i] = false;
        } else {
            if (have[i][0] > 0 && have[i][1] > 0) ret[i] = false;
        }

        have[i][C[i]-1]++;
    }

    return ret;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 9
• Subtask 2: 0 / 5
• Subtask 3: 0 / 9
• Subtask 4: 0 / 8
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 12
• Subtask 8: 0 / 17
• Subtask 9: 0 / 12